214 BOTANICAL GAZETTE [iL\RCH 



has been able to secure more favorable material for study and has just published^^ 

 his results. The genus belongs to the Taxodineae, and resembles Cunninghamia 

 in the form pf its cones, Arthrotaxis in its foliage, and Ciyptomeria in its habit. 

 A study of the anatomy of the leaf shows that in this feature it is intermediate 

 between Cunninghamia and Cryptomeria, and perhaps nearest to Arthrotaxis. 

 On the whole, the author concludes that it should be placed among Taxodmeae 



tamia and Arthrotaxis. — ^J. M. C. 



Synopsis of Godetia.— \V. L. Jepson-^^ has published a synopsis of the North 

 American species of Godetia, which are restricted to the Pacific coast and are 

 represented chiefly in California. After some account of the history of the genus, 



specimens 



gnized species 



group, comprising the loosely flowered, freely branching forms; and the Purpurea 

 group, comprising the spicately flowered, shnple stemmed forms. The critical 

 character of the study may be suggested by the statement that there are published 

 S new species, 15 new varieties, 6 new forms, and 3 new combinations. The 'kittle- 

 known species, old and recent," number 11.— J. M. C. 



Nitrogen fixation by algae.— After a valuable review of the literature of the 



nitrogen by algae. 



fixation 



fungi; 



possess this pow^r. In this paper it is shown that some algae, Nostoc for example, 



possess this power 

 not very important 



s}Tnbiot 



with such nitrifying organisms as Azotobacter; the work of the latter is doubtless 

 facilitated largely by the carbohydrate contributions of the algal s}mibionts 



H. C. COWLES. 



Anatomy of Equisetnm.— Qi:£va's33 studies on the histology of Equisetum 



ndarj' growth does not exist even in the n< 

 cambial activity. Since serondarv wood 



common m the Calamites, and Jefpbey has observ^ed a cambium 

 £. hiemale and E. llmosum, it is probable that we have here to do v 

 structure. The cortex arises by tangential divisions of a superficial 



[em 



dually disappears owin 



1 the 

 M. A. 



30 Hayata, B., On Taiwania and its affinity to other genera. Bot. :Mag. Tokyo 

 2X: 21^-27. pLT. 1907. ' ^ 



Jepso 



;alif^ 



®^' 2:319-354. pi 29. 1907. 



HecsZE, B., Einige Beitrage zur mikrobiologischen Bodenkunde. Cent. Bakt 



640-^ 



906 



QuEVA, C, Histogen^se et structure de stipe et de la fronde des Equisetum. 

 Soc. Hist. ?i.it H^i.,^„„ -,«. - _ ^ 



